Water-dispersible block copolyesters useful as low-odor adhesive raw materials
AssigneeEastman Chemical Company
InventorsScott Ellery George, Bobby Jones Sublett, Richard Anthony Miller
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Abstract
Disclosed are linear, water-dispersible sulfopolyesters incorporating a low molecular weight polyethylene glycol and blocks of a high molecular weight polyethylene glycol. The block sulfopolyesters have improved toughness, abrasion resistance, flexibility, and adhesion. Particular utility is realized in polyester fiber sizing applications and as an adhesive.
Claims36
A linear, water-dispersible, block sulfopolyester including:
- (i) 70 to 100 mol %, based on total moles of acid equivalents, of at least one difunctional dicarboxylic acid which is not a sulfomonomer;
- (ii) 2 to 15 mol %, based on total moles of acid and glycol equivalents, of at least one difunctional sulfomonomer containing at least one metal sulfonate group bonded to an aromatic ring, wherein the functional groups on said difunctional sulfomonomer are selected from the group consisting of esters, hydroxyl, or carboxyl groups to provide water-dispersibility to said sulfopolyester;
- (iii) from about 25 to 99.9 mol %, based on the mol % of hydroxyl equivalents of at least one polyethylene glycol having the structure:
- H(OCH.sub.2 CH.sub.2).sub.x --OH
- where x is an integer of from 2 to 6;
- (iv) 0.1 to 20 mol %, based on total moles of hydroxyl equivalents of at least one polyethylene glycol having the structure:
- H(OCH.sub.2 CH.sub.2).sub.y --OH
- where y is an integer of from 3 to about 500;
- wherein x<y;
- wherein the sulfopolyester contains substantially equal molar proportions of acid equivalents and glycol equivalents, and wherein said sulfopolyester has an inherent viscosity of at least 0.28 dL/g measured in a 60/40 parts by weight solution of pheno/tetrachloroethane at 25.degree. C. at a concentration of about 0.50 g of sulfopolyester in 100 ml of solvent.
A linear, water-dispersible, block sulfopolyester comprising repeating units of sulfomonomers containing at least one sulfonate group attached to an aromatic ring and polyethylene glycol, the improvement comprising having at least two different polyethylene glycol units of differing molecular weights, wherein at least one polyethylene glycol unit has the structure:
- H(OCH.sub.2 CH.sub.2).sub.y --OH
- where y is an integer of from 3 to about 500;
- said sulfopolyester characterized by being a low odor, linear, water-dispersible sulfopolyester having a dry Tg ranging from -50 to 20.degree. C., an inherent viscosity of at least 0.28 dL/g as measured in a 60/40 parts by weight solution of phenol/tetrachloroethane at 25.degree. C. at a concentration of 0.50 g of polymer in 100 mol of solution.
A linear, water-dispersible, block sulfopolyester including:
- (i) 70 to 100 mol%, based on total moles of acid equivalents, of at least one difunctional dicarboxylic acid which is not a sulfomonomer;
- (ii) 2 to 15 mol%, based on total moles of acid and glycol equivalents, of at least one difunctional sulfomonomer containing at least one metal sulfonate group bonded to an aromatic ring, wherein the functional groups on said difunctional sulfomonomer are selected from the group consisting of esters, hydroxyl, or carboxyl groups to provide water-dispersibility to said sulfopolyester;
- (iii) from about 25 to 99.9 mol%, based on the mol% of hydroxyl equivalents of at least one polyethylene glycol having the structure:
- H(OCH.sub.2 CH.sub.2).sub.x --OH
- where x is an integer of from 2 to 6;
- (iv) 0.1 to 5 mol%, based on total moles of hydroxyl equivalents of at least one polyethylene glycol having the structure:
- H(OCH.sub.2 CH.sub.2).sub.y --OH
- where is an integer of from 3 to 500;
- wherein x<y;
- wherein the sulfopolyester contains substantially equal molar proportions of acid equivalents and glycol equivalents, and wherein said sulfopolyester has an inherent viscosity of at least 0.1 dL/g measured in a 60/40 parts by weight solution of phenol/tetrachloroethane at 25.degree.C at concentration of about 0.50 g of sulfopolyester in 100 ml of solvent.
Dependencies are inferred from the claim text.